OP PHILADELPHIA. 2S9 



angles rounded : elytra abruptly truncate at tip, rather more tlian 

 two-thirds the length of the abdomen : feet rufous. 



Length less than one-tenth of an inch. 



The smallest species I have seen. 



[I have not identified the species : it is probably a Carpopld- 

 las. — Leg.] 



SCAPHISOMA Leach. 



S. CONVEXA. — Highly polished, black ; antennae, mouth, feet, 

 and tail piceous. 



Scaphidium convcxum Melsh. Catal. 



Body black, very highly polished ; head piceous, paler before, 

 with a deeply impressed, transverse arcuated line between the 

 eyes : thorax with, minute, rather distant puncture : elytra, punc- 

 tures, excepting towards the base, more obvious than those of 

 the [184] thorax; terminal and posterior lateral margin ob- 

 scurely piceous : feet, abdominal incisures and tail piceous. 



Length one-tenth of an inch. 



I received this species from Dr. J. F. Melsheimer, under the 

 denomination I have adopted. From all I can learn, it seems to 

 be very closely allied to the *S'. agarica of authors, of which, in 

 fact, it may possibly prove to be a variety. 



CATOPS Fabr. 



1. C. OPACUS. — Brownish-black, opaque; terminal and two 

 basal joints of the antennae rufous. 



Ptomophagus opaciis Melsh. Catal, 



Body sericeous, with minute hairs, which, in a particular light 

 are pale ferruginous : antennae with the seventh joint largest, the 

 eighth smallest : elytra not striated, but with a subsutural im- 

 pressed line, and very numerous minute punctures, furnishing 

 minute hairs : feet blackish piceous. 



Length less than one-fifth of an inch. 



Occurs frequently in a species of Ili/dnum. 



2. C. SIMPLEX. — Pale brownish, sericeous; terminal and five 

 basal joints of the antennae rufous. 



Inhabits Arkansa. 



Head dark ferruginous; antennse dark ferruginous, the five 

 basal joints and terminal joint rufous ; palpi and mandibles ferru- 

 1825.] 19 



